-80.19% is the change from 419 to 83
Calculation steps:
[( 83 - 419 ) ÷ 419] x 100 = -80.19%
Formula
Percentage change = [(83 - 419) / 419] x 100
Subtract the new number by the original number
83 - 419 = -336
-336 ÷ 419 = -0.801909307875895
-0.801909307875895 x 100 = -80.19%